package io;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("gz.jpg");
        FileOutputStream fos = new FileOutputStream("gz_cp.jpg");

        long start = System.currentTimeMillis();
        byte[] data = new byte[1024*10];
        int len;
        while((len=fis.read(data))!=-1){
            fos.write(data,0,len);
        }
//        while (fis.read(data)!=-1){
//            fos.write(data);
//        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕，耗时："+(end-start)+"ms");

        fis.close();
        fos.close();
    }
}
